Time filter

Source Type

Navi Mumbai, India

Chandra P.,CWPRS | Patel P.L.,SVNIT | Porey P.D.,SVNIT | Gupta I.D.,Indian Institute of Technology Roorkee
ISH Journal of Hydraulic Engineering | Year: 2014

Estimates of sediment yield are needed for studies of reservoir sedimentation, river morphology and planning of soil and water conservation measures. The Soil and Water Assessment Tool model, a physically based distributed hydrological model, is utilized for sediment yield estimation in the Burhanpur subbasin measuring an area of 8487 km2 in Upper Tapi catchment. The basin shows large heterogeneity in terms of hydrological parameters, land use - land cover and soil features. The model has been calibrated and validated using observed run-off and sediment yield data of 12 years at the basin outlet. The average values for Nash-Sutcliffe efficiency (NSE) and RSR for sediment yield are found to be 0.85 and 0.36, respectively, which are within satisfactory limits. © 2014 Indian Society for Hydraulics.

Joshi S.,KLEIT Hubli | Gupta I.D.,Indian Institute of Technology Roorkee | Pattanur L.R.,CWPRS | Murnal P.B.,Government College of Engineering, Aurangabad
International Journal of Geotechnical Earthquake Engineering | Year: 2014

The inhomogenieties of the foundation can be modeled explicitly in standard FEM procedure, however, the results vary significantly with the extent of foundation block modeled and mechanism of applying the input earthquake excitation. The substructure approach provides mathematically exact solution but assumes average properties for the entire foundation as viscoelastic half space. This paper has carried out detailed investigations with varying impedance contrasts and different size of foundation block to show that the results, with suitably deconvoluted free-field ground acceleration time-history applied at the base of foundation block in the FEM approach, are in good agreement with the substructure approach. However, the other variants of the FEM approach may lead to erroneous and overestimated stresses in the dam body. As the foundation of gravity dams can generally be approximated as an equivalent homogeneous half-space, the more accurate and efficient substructure approach can be used to model the dam-foundation rock interaction (SSI) effects in most practical situations. Copyright © 2014, IGI Global.

Singh A.K.,Mody Institute of Technology and Science | Shukla V.P.,CWPRS | Biradar S.R.,SDM | Tiwari S.,Mody Institute of Technology and Science
International Review on Computers and Software | Year: 2014

Object detection and classification is very important part in images having complex background in computer vision. The objective of this work is to construct a classification system for identification of multiclass object images surrounded by complex back ground. The object images of three classes are taken from various databases for training and testing the performance of classifier. A blocking model is presented for feature extraction of the image after pre processing of the image. The curvelet features are extracted from each of the block of the image and then applied to neural network based classifier. The performance of the system is evaluated and compared by three experiments with varying block numbers. Experimental results exhibits that method is effective and give the better results than other method of feature extraction using statistical and wavelet. © 2014 Praise Worthy Prize S.r.l. - All rights reserved.

Catherine J.K.,CSIR - Central Electrochemical Research Institute | Gahalaut V.K.,CSIR - Central Electrochemical Research Institute | Kundu B.,National Institute of Technology Rourkela | Ambikapathy A.,CWPRS | And 4 more authors.
Journal of Asian Earth Sciences | Year: 2015

We analyse nine years of GPS measurements of crustal deformation from the Koyna-Warna region within the stable India plate. The Koyna-Warna region experienced a strong earthquake on 10 December 1967 (M 6.3) that is considered to have been induced by the impoundment of the Koyna reservoir and the continuing earthquake activity in the region is considered to be associated with the Koyna and Warna reservoirs. The earthquakes occur in a very small region of 30×10km2 in two well defined seismic zones, the NNE-SSW trending Koyna Seismic zone, and the NNW-SSE trending Warna Seismic Zone. These zones are characterised by predominantly left-lateral strike slip motion and normal motion, respectively. In 2003, we initiated campaign-mode GPS measurements in the region. Analysis of the GPS data collected over nine years indicate low to moderate deformation rate (<2±0.5mm/year) at a few sites within and close to the fault zones and no resolvable deformation elsewhere. This has been seen in many intra-plate seismic regions of the world with varying causative mechanism for the deformation. In the Koyna Warna region, the observed surface displacement rates of up to 2mm/year near the fault zones are consistent with a fault slip rate of about 7mm/year, and with the inferred sense of motion on the faults. The inferred fault slip rate is consistent with the total moment release during earthquakes of past six years in the Koyna Warna region which may imply that the ongoing earthquake activity causes the deformation in the region. © 2014 Elsevier Ltd.

Das S.N.,CWPRS | Kulkarni S.,CWPRS | Kudale M.D.,CWPRS
Procedia Engineering | Year: 2015

In order to keep pace with the modern oil transport trends, the Indian ports are also developing terminal facilities for Very Large Crude Carrier (VLCC). A conceptual design methodology for marine oil terminal (MOT) including mooring system for large oil tankers has been evolved. The orientation of the MOT and mooring arrangements for 200000 DWT oil tanker were determined considering the environmental conditions prevailed at the site. Water flow velocity played an important role in the orientation of the MOT. Quick Fender Selection Method (QFSM) has been considered for the selection of fender system and it was found that supercone fenders of 2 m height or equivalent type of fenders were suitable for the oil tanker. The mooring arrangements comprising of steel ropes with nylon tails, sustained the effect of high winds of 60 knots associated with currents and waves. Finally, simulation of moored ship motions for moderate environmental conditions i.e., wind speed of 30 knots, current speed of 4 knots and 1 m wave height was carried out using quasi-static approach. The ship motions in six degrees of freedom were found within the permissible limit for safe cargo handling operation. The maximum rope tensions, fender compressions and bollard pull were found to be 195 ton, 0.51 m and 199 ton respectively. © 2015 The Authors. Published by Elsevier Ltd.

Discover hidden collaborations